Ⅰ．单句语法填空
1.(2020·天津卷改编)Jim says we __can stay in his house as long as we leave it clean and tidy.
解析：考查情态动词。句意：吉姆说我们可以住在他的房子里，只要我们保持它干净整洁。根据后面的“as long as we leave it clean and tidy”可知，Jim许可我们待在他的房子里，即：我们“能，可以”待在他的房子里。故填can。
2．(2020·江苏卷改编)If I hadn’t been faced with so many barriers, I __would/could/might/should not be where I am.
解析：考查虚拟语气。句意：如果我没有面对那么多的障碍，我现在就不会在这里。分析句子成分可知，此处是错综时间虚拟语气，根据空后where I am可知，此处是与现在事实相反的假设，主句谓语动词应使用would/could/might/should＋do。故填would/could/might/should。
3．Jack is a great talker. It’s high time that he __did/should do (do) something instead of just talking.
解析：考查固定句型It is high time that sb. did/should do sth. “到某人该做某事的时候了”。故填did/should do。
